/* ===============================
   ROOT COLOR SYSTEM
================================ */
:root {
    --color-black: #000000;
    --color-tan: #86745c;
    --color-light-tan: #c2baab;
    --color-dark-tan: #6a5c48;
    --color-white: #ffffff;
    --color-black-63: rgba(0, 0, 0, 0.63);
    --color-black-80: rgba(0, 0, 0, 0.8);
    --color-black-88: rgba(0, 0, 0, 0.88);
    --color-gold: #b19977;
    --color-accent: #b19977;
    --color-accent-light: #c2baab;
}

/* ===============================
   GLOBAL RESET
================================ */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Courier New', monospace;
    background: var(--color-black);
    color: var(--color-white);
}

/* ===============================
   CENTERED SCREEN
================================ */
.center-box {
    height: 100vh;
    display: flex;
    flex-direction: column; /* FIXED */
    justify-content: center;
    align-items: center;
    text-align: center;
}

.center-box > * {
    margin: 10px 0;
}

/* ASCII Penguin */
.penguin {
    color: #00ff41;
    white-space: pre;
}

/* ===============================
   INPUTS + BUTTONS
================================ */
input {
    padding: 10px;
    margin: 10px 0;
    width: 250px;
    background: black;
    border: 1px solid var(--color-accent);
    color: #00ff41;
    text-align: left;
    outline: none;
}

button {
    padding: 10px 20px;
    margin: 10px;
    background: var(--color-accent);
    color: black;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: 0.2s;
}

button:hover {
    background: var(--color-white);
    transform: scale(1.05);
}

/* ===============================
   DASHBOARD
================================ */
.dashboard {
    text-align: center;
    padding: 40px;
}

#lessonList {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

#lessonList button {
    width: 220px;
    background: var(--color-dark-tan);
    color: var(--color-white);
    border: 1px solid var(--color-accent);
}

#lessonList button:hover {
    background: var(--color-accent);
    color: black;
}

/* ===============================
   SPLIT TERMINAL LAYOUT
================================ */
.split {
    display: flex;
    height: 100vh;
}

/* LEFT PANEL */
.left-panel {
    width: 35%;
    padding: 20px;
    overflow-y: auto;
    background: var(--color-dark-tan);
    border-right: 2px solid var(--color-accent);
}

/* RIGHT PANEL */
.right-panel {
    width: 65%;
    padding: 20px;
    background: black;
    color: #00ff41;
    display: flex;
    flex-direction: column;
}

/* ===============================
   TERMINAL OUTPUT
================================ */
#output {
    flex-grow: 1;
    overflow-y: auto;
    white-space: pre-wrap;
    margin-bottom: 10px;
}

/* ===============================
   INPUT LINE (FIXED)
================================ */
.input-line {
    display: flex;
    align-items: center;
    width: 100%;
    border-top: 1px solid var(--color-accent);
}

/* PROMPT */
#prompt {
    padding: 10px;
    color: #00ff41;
    font-weight: bold;
    white-space: nowrap;
}

/* INPUT (FIXED FULL WIDTH) */
#input {
    flex-grow: 1; /* 🔥 KEY FIX */
    background: transparent;
    border: none;
    color: #00ff41;
    font-size: 1rem;
    outline: none;
    padding: 10px;
}

/* ===============================
   LESSON CONTENT
================================ */
#content {
    line-height: 1.6;
}

#content b {
    color: var(--color-accent-light);
}

/* ===============================
   HEADINGS
================================ */
h1 {
    color: var(--color-accent);
}

h2 {
    color: var(--color-accent-light);
}

/* ===============================
   SCROLLBAR
================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-thumb {
    background: var(--color-accent);
}